Find the Domain and Range y=1/2csc(2x)

$y = \frac{1}{2} \csc (2 x)$

Set the argument in $\csc (2 x)$ equal to $π n$ to find where the expression is undefined.

$2 x = π n$ , for any integer $n$

Divide each term in $2 x = π n$ by $2$ and simplify.

Divide each term in $2 x = π n$ by $2$ .

$\frac{2 x}{2} = \frac{π n}{2}$

Simplify the left side.

Cancel the common factor of $2$ .

Cancel the common factor.

$\frac{2 x}{2} = \frac{π n}{2}$

Divide $x$ by $1$ .

$x = \frac{π n}{2}$

The domain is all values of $x$ that make the expression defined.

Set-Builder Notation:

${x | x \neq \frac{π n}{2}}$ , for any integer $n$

The range is the set of all valid $y$ values. Use the graph to find the range.

Interval Notation:

$(- \infty, - \frac{1}{2}] \cup [\frac{1}{2}, \infty)$

Set-Builder Notation:

${y | y \leq - \frac{1}{2}, y \geq \frac{1}{2}}$

Determine the domain and range.

Domain: ${x | x \neq \frac{π n}{2}}$ , for any integer $n$

Range: $(- \infty, - \frac{1}{2}] \cup [\frac{1}{2}, \infty), {y | y \leq - \frac{1}{2}, y \geq \frac{1}{2}}$